Welcome to the RPAcademy, Proclaimer! So I could get a better understanding of your level of writing I'm going to go ahead and give you your first assignment. Remember, don't hesitate to ask any questions if I am not being clear on a particular subject. Here I will emphasize grammar, flow, character development, and plot development. Good luck!!

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First Assignment: Write a post on the following scenario.
Setting: Your home
Problem: There are cops knocking at your door

Most importantly, don't forget to have fun

Inside my room, a coin slicked through my fingers, dwindling through them like a man fidgeting with his thumbs. It had been a very long day, longer than most. Blood stained his sleeves, and his chest, wearing an old style white shirt, the blood standing out greatly in them. Below he wore an even thinner material, a white pair of pants, his outlook today was very bright but pale.

His eyes told his story, and his lips curved slightly into a frown. Staring out the window as cop cars pulled up, not moving an inch. Finally a large roar rang clear through his door, shuddering through his penthouse. Turning around as he walked unnervingly to the door, opening it. The lights suddenly shutting out on him.

A knife now plunged into his stomach as he stood there, smiling as he fell to the floor. An easy escape on what deeds he took took action on, and now he would pay with his life, his soul, by his own hand.

You have a lot of potential and pretty good flow! Just needs a liiiittle bit of tweaking, for instance when you posted: Inside my room, a coin slicked through my fingers, dwindling through them like a man fidgeting with his thumbs. It had been a very long day, longer than most. Blood stained his sleeves, and his chest, wearing an old style white shirt, the blood standing out greatly in them.

Your first sentence started in first person point of view and then toward the third sentence you switched to third person. That's a biiiiig no, no in RP. I know most people tend to use third person when RPing but I also know a few people that RP just fine in first person. Just not both lol so whichever you're most comfortable with, stick to that one.

Also in this sentence particularly: Blood stained his sleeves, and his chest, wearing an old style white shirt, the blood standing out greatly in them.

The comma isn't needed after the word "sleeves" and it's also missing a noun that directly links to "wearing." I would have done something like: Blood stained his sleeves and his chest as he wore an old style while shirt - the blood standing out greatly in them.

Here it seems as if you were listing things and then went off in another direction: Below he wore an even thinner material, a white pair of pants, his outlook today was very bright but pale.

I can see that you like commas lol but yea, I would have done something like: Below he wore an even thinner material in a white pair of pants as his outlook today was very bright but pale.

Moreover when you posted: Staring out the window as cop cars pulled up, not moving an inch.

You're also missing a noun here. You've very good with gerunds (words ending with -ing) but sometimes you forget to put a noun in there. This could easily be fixed by putting "He was" before the word "Staring."

Kind of the same thing here: Turning around as he walked unnervingly to the door, opening it.

It's missing a main verb so this would have been fine: Turning around as he walked unnervingly to the door, he opened it.

And here: The lights suddenly shutting out on him.

Sometimes when you use gerunds on their own, they become fragments. So changing that gerund to a verb would fix that like: The lights suddenly shut out on him.

Here you're also missing a pronoun at the beginning: An easy escape on what deeds he took took action on, and now he would pay with his life, his soul, by his own hand.

So putting "It was" before "An" would've fixed that.

Let me know if any of this is unclear!

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Revision Assignment: Edit your previous post, taking into consideration everything that was discussed above.
Focus: Remember to be wary of those commas and don't forget to use nouns with your gerunds!

Inside the room, a coin dwindling through his finger like a man fidgeting with his thumbs. It had been a day longer than most. Blood stained his sleeves and his chest which stood out greatly while wearing an old style white T-shirt. Below he wore an even thinner pair of white pants which you could almost see his light creamy skin through it; his outlook today was very bright but pale.

His eyes told his story, and his lips curved slightly into a frown. He was staring out the window as cop cars pulled up, not moving an inch as his eyes flickered. Finally a large roar rang clear through his door, shuddering through his penthouse. Turning around and walking unnervingly to the door, he opened it; suddenly the lights shut out on him.

A knife now plunged into his stomach as he stood there, smiling as he fell to the floor. It was an easy escape on what deeds he took took action on, and now he would pay with his life, his soul, by his own hand.